Ransom crosby



Nrn srnrns PATENT xoruuci..

RANSOM CROSBY `AND HENRY D. EDGCOMB, OF DEWV YORK, N. Y.; SAID EDGCOMBASSIGNORTO SAID CROSBY AND SAID CROSBY ASSIGNOR TO RANSOM CROSBY, JR.,

MACHINE FOR '.IONGrTJ'INGr` BOARDS.

'specification f Letters Patent No. 8,870,` dated April 1e, 1852.

To all whom t may concern:

Be it known that we, RANsoM CROSBY and HENRY D. EDGooMB, of the city ofNew York, in the county of New York and State of New York, have inventedcertain Improvements in Machinery for Tonguing and Grooving Boards, andthat the following is a full, clear, and exact description of theprinciple or character' which distinguishes it from all other thingsbefore known and of the usual manner of making, modifying, and using thesame, reference being had to the accompanying drawings, of which- Figure3 is a plan; Fig. 4, an elevation of the tonguing side; Fig. 5, a sideview of the double tonguing stock; Fig. 6, section of same.

Great difficulty has been encountered in the employment of stationaryknives or planes for the purpose of tonguing and grooving boards, foralthough it -would seem that the ordinary construction would act asefficiently for that purpose as upon the surface practical experimenthas shown insurmountable difficulties to its employment on account ofclogging, which could not be overcome by the most careful adjustment.Our improvements have been made with a view to overcome thesedifficulties, and we find by experiment that we have obviated .them bythe within described apparatus entirely.

The machine consists of a frame (a) to which the several parts areattached.

(b) is the stock in which the cutters are set for forming the tongue onthe board. This stock is fixed to the frame (a) and has projections onits inner sides, to which the plane bits are attached, in two lines, oneon each side of the tongue, leaving an open space between the stock,which may be made in two parts so as to be adjustable to different sizesof tongues as shown in Fig. 5 where the upper part of the stock with itscutters can be moved to or from the lower portion by the screws (c) isthe stock containing the cutters for plowing the grooves and also theplanes which reduce the board to the proper width as it enters themachine. This stock is made to slide to or from the other stock (b) 0nthe bars of the frame (d) by means of screws passing through the frame,and made to turn together by bevel wheels or other suitable contrivance,so that the stocks shall ted altogether.

. A single pair of cutters (it) may be employed, or they may in somecases be omit- The planes remove the wood on each side of the tongue,and are so arranged in the stock as to allow of the free escape of theshavings; every part of the stock between the planes being out awayexcepting so much as is just sufficient to produce the proper supportand action of the cutters, which prevents all difficulty from theclogging or stoppage of the shavings.

The planesareplaced in succession each one being set a little deeperthan the one preceding it, so as to remove the wood in thin shav- Themovable stock (c) contains the cutters and planes for plowing thegroove. The rolling cutter (i) is made of two disks. These cutters aswell as those for forming the tongue may have a lip or edge turnedforward on the cutting sides, next the` tongue, as shown in Fig. 7,showing a to-nguing cutter detached, which makes better work when thelumber is wet or` crossfree escape to the chips and prevent choking,

and those portions (o) forming the bed of each plane iron is onlyattached to the underside of the cap piece (0') or to the upper side ofthe' bed piece of the plane stock leaving an open space between by whichwe effectually prevent clogging by leaving the throat of the planeentirely open.

In cases where the boards are required to have a bead next to the jointwe form two planes see Fig. 5, so as to cut the bead, as the boardpasses through the machine.

At the forward end of thenstock (c) are placed the planes (le) for thepurpose of reducing the board to the proper width preparatory to cuttingthe tongue and groove. Between the plane irons are spring bars orVseparate stocks substantially as herein described with a space betweenthem for the escape of shavings the sides of the stock beingsubstantially parallel to the face of the board and each other and thesurfaces of their soles being substantially perpendicular thereto, theplane irons being inclined in the usual way to the soles and backs ofthe stocks and the cutters in their length being substantially parallelto the sides thereof.

We are aware that two sets of cutters in separate stocks have beendifferently arranged and for an analogous purpose and we therefore donot claim them except in the arrangement and position substantially asabove described.

RANSOM CROSBY. HENRY D. EDGCOMB.

Witnesses:

WM. B. MEECHY, W. C. CARPENTER. l

